Locking mechanism



May 26, 1931.

J. FJFETYK LOCKING MECHANISM :s Sheets-Shet 1 Filed June 6, 1925 lluuw flli m lm M a ain May 26, 1931. FETYK 1,806,991

LOCKING MECHANISM Fil ed June 6, 1925 5 Sheets-Sheet 2 May 26, 1931. FETYK 1,806,991

LOCKING MECHANISM Filed June 6, 1925 3 Sheets-Sheet .3

Patented May 26, 1931 r UNITED STATES PATENT oFF c JOSEPH RTETYK, OF NEW YORK, N. Y., ASSIGNOR T'O FRANGIS KEIL 8c SON, INC.,- A. CORPORATION OF NEW YORK LOCKING MECHANISM Application filed June 6, 1925. Serial No. 35,275.

means of a tool. Another object is to pro -vide a lock construction in which a bolt is prov j-ected and rotated or otherwise swung into final locking position and in which means are provided to dependably prevent rotation or swinging of the boltby means of an implement to initiate the unlocking movement. A further object is to provide a locking mechanism arranged in such manner that the parts are dependably retained in place and are yet readily accessibleto permit convenient assembly of the parts in the manufacture of the locks, or to permit access to the mechanism for purposes of repair or replacementof parts. Other objects will be in a part obvious or in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified inthe structure to be hereinafter described and the scope of the application of which will be indicated in the following claims. y

In the accompanying drawings in which is shown one of the various possible embodiments of this invention,

Figure 1 shows the lock and keeper in elevation from What may be termed the rear side thereof since the side shown is that which 0 rests against the door surface or other surface to which the lock is secured; V

Figure 2 is a View of the lock mechanism from the rear, the rear wall or cover plate of the casing being removedand the bolts being 5 shown in retracted position;

Figure 3 is a View simi-l arto Figure 2 showi-ng the bolts projected but not swung into final locking position; Y 7

Figure 4- isa view similar to Figures 2 and 3 3 showing the bolts in final locking position;

Figure 5 is a view from the left-hand side of Figure {1;

Figure 6 shows the lock casing viewed as in the preceding three figures but with the bolts and the major portion of the operating mechanism removed;

Figure 7 shows the parts which are removed from the lock casing in the view of Figure 6; Y

Figure 8 is a perspective view of a sliding plate forming a part of the operating mechanism; I

Figure 9 is a perspective View of another sliding member; r V

Figure 10 is a view from the left-hand side of Figure 2; V

Figure 11' is a perspective view of a retaining plate employed for mounting the bolts in position;

Figure 12 is an elevation of the rear cover plate, showing the inner side thereof Figure 13 is a perspective view of a sliding member forming part of the operating mechanlsm;

Figure 14; is a face view of the keeper; V

Figure 15 is a side elevation of a key barrel;

F igure 16 is a View from the right of Figure 15, and

Figure 17 is a side elevation of a key for operating the lock.

Similar reference characters refer to similar parts throughout the several views of the drawings. I v 7 Referring now to the drawings in detail and first to Figure 1', there is shown the rear side of a lock casing 1 and a keeper 66 adapted to receivethe bolts of the lock to be hereinafter described.- The rear side of the lock casing'isclosed by a removable wall or rear cover plate 52 which is held in place as by plate 52 is secured in place to complete the assembly.

Referring to Figure 2, the lock is shown with the rear cover plate 52 removed. As shown in this figure, there are provided two bolts 13 and 14 which are slidable inwardly and outwardly through the end wall 1a of the casing and which are also mounted to rotate or swing about their respective longitudinal axes. The bolts are secured at their inner ends to an upstanding flange 11 of a member 6 which is in the shape of a plate member and is slidably mounted in the casiu g for sliding movement in a direction lengthwise of the bolts. The sliding plate 6 is shown in detail in Figure 7. The end flange 11 thereof is provided with an opening 12, in the end portions 12a and 12b of which the rear end portions of the bolts 13 and 14 are respectively received. As shown in Figure 7, the bolts are provided with reduced inner end portions which rest in the ends of the slot 12 and, rearwardly of these reduced portions, the bolts have larger portions or heads 13a and 14a. These heads 13a and 14a are of suflicient size to be unable to pass through the slot portions 12a and 127), and they rest respectively in openings 18 and 19 of a plate 17 which is shown in detail in Figure 11. This plate 17 is secured to the face of the flange 11 by means of a suitable screw 22 (Figure 2). In assembling the bolts with the sliding plate 6, the rear end portions of the bolt are slipped through the larger middle portion of the slot 12 and are then moved into their positions at the ends of the slot; thereupon the plate 17 is secured in place to hold the bolts in position with respect to the plate 6.

The bolts 13 and 14 are thus mounted for sliding movement with the plate 6 and for turning or swinging movement about their respective axes relative to the plate 6. The plate 6 is guided in its sliding movement by suit able guiding lugs 7, 8, 9 and 10 (Figure 2) which are formed on the inside of the casing and engage the edges of the plate as it slides. The sliding plate 6 has a pair of outstanding side flanges 29a and 30a and, mounted upon the plate 6 between these flanges is a second sliding member 25, slidably relative to the plate member 6 in a direction lengthwise of the bolt-s. The sliding member 25, which may be termed an auxiliary sliding plate, is shown in detail in Figure 9. It is provided with a projecting arm 24 which projects through a notch 23 in the plate 17 (Figure 11) and through the middle of the opening 12 in the flange 11 (Figure 8) and which has at its end a pair of projecting lugs 27 and 28.

Referring to Figure 2, the bolts 13 and 14 are provided in their surfaces with a pair of spiral grooves 29 and 30 respectively, with which the lugs 27 and 28 of the arm 24 respectively engage. Thus, when the sliding a direction to extend the bolts.

nsoaeei plate 6 moves and the member 25 moves therewith, the bolts 13 and 14 are moved longitudinally and thereby given a projecting or retracting movement; when the sliding member 25 slides relatively to the plate member 6, the lugs 27 and 28 of the arm 24, operating in the slots 29 and 30 of the bolts, cause the bolts to rotate or swing about their respective longitudinal axes.

As shownin Figure 2, there is mounted upon the sliding member 25 a member 39 in the shape of a relatively narrow plate member which is slidable in a direction transversely of the member 25, or in a vertical direction as viewed in the drawings.

This member 39 is shown in detail in Figure 13. Its side edges and 41 are beveled and mate with correspondingly beveled sides 37 and 38 (Figure 9) of agroove 31 formed in the member 25 between the portions 35 and 36 thereof. The member 39 is provided with an upwardly flanged and reversely bent end portion 43 against which bears a spring 44 (Figure 2). The spring 44 is coiled about a post 45 and its end engages a projection 46, both positioned upon the sliding member 25; the action of the spring 44 against the member 39 tends continually to urge the member 39 to slide into a position such as shown in Figure 2 or in Figure 4, or in a downward direction as viewed in the drawings.

Referring to Figure 10, positioned upon the front side of the casing is a handle 2 which is rotatably mounted in the front wall of the casing and has mounted upon its inner end, as shown in Figure 6, a crank arm 3 provided with a crank pin 4. The crank pin 4 projects through a slot 5 in the plate 6 (Fig ure 8), through a slot 32 in the sliding member 25 (Figure 9) and into an opening 42 in the transversely sliding member 39 (Figure 13). In Figure 2 the crank pin 4 is shown engaging the sliding member 39.

Considering now the action of the lock, in Figure 2 the bolts are shown in retracted or withdrawn position. By turning the crank arm, by means of the handle 2, in a counterclockwise direction as viewed in the drawing, the parts are moved toward the position shown in Figure 3. The action of the crank pin 4, as the crank arm 3 rotates, is to slide the member 39 upwardly, as viewed in the drawing, and at the same time to move the sliding plate 6 and the slide 25 as a unit in The bolt 13 is provided with a projecting lug 48 which slides over a lug 49 on the lock casing and thus prevents rotation of the bolts during this portion of the movement between the position shown in Figure 2 and the position shown in Figure 3. hen the position shown in Figure 3 is reached, the lug 48 has moved out of engagement with the lug 49 and the bolts are substantially fully extended. At this time the edge 6a of the plate 6 comes into engagement with the lug. 49 and the movement of the plate 6' is thereby arrested. Thereafter, upon continued turning. of the crank arm 3, the" slide moves relative to the sliding plate 6' and causes turning of the bolts, the" parts moving into final locking position as shown in Figure 4. v

-Th'e' bolts 13 and 14: are provided at their outer ends with transverse projections 15.= Between the two positions or" the bolts shown in Figures 2 and 3-, the angular position of the bolts is thatshown in Figure '10. Referring to Figure 14, as the bolts are projected,- their end portions enter a slot67 in the keeper 66. The subsequent rotation of thebolts throws the projections 15- into' the po sition shown in Figure 5, in which position they are out of line with respect to the open ing 67 through which they haveentered the keeper. Thus, the bolts cannot be directly retracted or withdrawn from the keeper but must first be rotated to bring them into the angular position shown in Figure 10. When the bolts are properly withdrawn, as by turning the handle 2, the first movement is a slidin ot the member 25 relative to the member 6 From the position shown in Figure 4 to the position shown in Figure 3, efiecting turning of the bolts and bringing their projections 15 again into such position that the bolts may be withdrawn from the keepertfurther turning of the handle 2 retracts the bolts from the position shown in Figure 3 to the position shown in Figure 2. g

As shown in Figure 2, the transversely sliding member 39 has an end portion 39a which, when the bolts are in retracted position, is positioned on the right-hand side, as viewed in the drawing, ofthelug 10 of the casing} Th th bolts are projected or extended as shown in Figure 4, this end portion39a of the member 39 comes into position on the left-hand side of the lug 10. Thus, the mewber 39' provides a positive stop preventing movement of the plates 25 and- 6 from their" positions corresponding to the locking position of the bolts andthe retractedposition of the bolts. The spring kfl, acting upon the member 39'tend toho1'd it in its locking position ateaehend of the move ment of the lock mechanism.

Referring to F igure8, there is clearly shown the slot or opening 5 of the sliding plate 6 in which the crank pin 45 operates;

When the bolts are in retracted position, as

shown in Figure 2, the crank pin 4 rests} the portion 5a of the opening 5, and when the bolts are in the locking po'sitmn shown in Fi ure 4 the crank in 4- restsin' the portion 5?) of the slot 5'. As the bolts are ex tended or projected, the crank pin 45 moves from the portion along the wall- 50 of the slot, the sliding members6' and 25' movingv together" as a unit during this portion of the movement 01E, the bolts; 11-l-iereafter,=. upon continued tnrningoi the crank arm 3, the ei a'nk pin 4 moves along thewall- 5d of the slot 5 coming to rest in the portion 56 thereoi the slide 25' moving relative to the slide 6 dnring this latter portion of the movement and the bolts" being thereby rotated or swung into" fin-al lbck-ing position.

As the boltsare moved from retracted position to final locking position, the crank ar-nr 3 turns through substantially 180". When the bolts are in retracted position, the crank armis on one side of its axis and in dead center position with respect to the direction 0t movement of the plates 6 and25; when the bolts are in final locking. position the crank arm isgon the opposite side of its pivot and asecond dead center position with respect to" the direction'of movement of the sliding plates. These dead center positions' of the crank arm 3 dependably lock the two sliding plates in their extreme positions and effectively oppose any attempt to move the bolts except by turning the crank. When theboltsare in extended and final locking position, the crank pin l engages with the wall portion 5e of the slot 5 (Figure 8) to positively prevent any attempted forcing of the bolts inwardly, and also, the engagement between the crank pin 4' and the transversely sliding member 39,- with the crank arm in dead center position with respect to the direction or movement or the plate 25, eflectii'rely guards against 'any attempt to rot'ate or swing the bolts out of their final lockingp'osition. When the bolts are in retracted position, the dead center position of the crank arni likewise prevents-movement'of the parts to project the bolts. 7

It will thus be seen that, when the bolts are extended and rotated into the final locking positionshown in Figures 1 and 5, the

possibility of swinging the bolts or of forcing the bolts'o'ut of thekeeper by means of any external agency is dependably" guarded against. Thislocking device thus provides a maximum of seeurit against attempts to jimmy or force the 100 in any way. In addition,:the bolts 13 and 14 are preferably provided with centers 16' (Figure 5) of hardened steel to forestall any attempt to saw the bolts in two.

From one side of the lock the lock mechanismis conveniently operated by turning the handle 2. From the other side the lock is operated by means of a key such as the key 63 shown in Figure 17. In Figure 15 there is shown a barrel 61 which is ordinarily inserted in the door upon which the look is mounted and which contains a rotatable cylinder 63 (Figure 16) and suitable tumblers which control the rotation of the key inserted therein. When the proper key is inserted into the cylinder 63 and is turned, a projecting bar 60 is rotated. The end of this bar 60 takes into a slot 54 (Figure 1) in a member 53 which is rotatably mounted in the rear cover plate 52 of the casing. Referring to Figure 12, the member 53 hassecured thereto on the inner side of the plate 52 a projecting crank arm 55 provided with a crank pin 56. A small spring 57 is fastened to the crank arm 55 and bears against the surface of the plate 52 to take up any looseness as the crank arm turns.

As shown in Figure 2, the sliding member 25 is provided with a pair of projecting flanges 33 and 34 between which the portion 43 of the transversely sliding member 39 moves. Vhen the key 63 is turned to operate the lock, the crank pin 56 engages with the part a3 of the slide 89 and with the flanges 33 and 34:. WVhen the bolts are projected by means of the key, the moving crank pin 56 first engages the part 43 and then the flange 83; when the bolts are retracted, the crank pin 56 engages the part 43 and then the flange 34.

The lock casing 1 is secured in position, generally upon a door, by means of suitable securing devices such as screws passing through openings 64 (Figure 1) in the casing 1 and through notches 65 formed in the edges of the rear cover plate 52. The keeper 66 is securely fastened to the door frame as by means of screws passing through holes 68 (Figure 14) and holes 68a (Figure 1).

In the assembly of this look, the bolts 13 and 14 and the sliding members 6, 25 and 39 are assembled as shown in Figure 7. Thereupon this mechanism is inserted into the casing 1, the crank pin 4 entering into the opening 42 of the transversely sliding member 39. The rear cover plate 52, as shown in Figure 12, is then secured in place. As shown in Figure 9, the sliding member 25 is provided with projecting posts or lugs 50 and 51 which are adapted to rest against the inner side of the cover plate 52 to guide the parts in their sliding movements and to properly retain the mechanism in position within the lock casing. Thus, the assembly of the lock is accomplished quickly and easily and, after assembly, the mechanism is easily accessible in case it is desired to make changes or repairs in the parts.

From the foregoing, it will be seen that the lock construction herein provided affords greatsecurity, is simple in construction and positive in action and achieves the objects of this invention, accomplishing advantages of real practical value. As many possible embodiments may be made of the above invention and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings is to be inter preted as illustrative and not in a limiting sense.

I claim;

1. A lock having a bolt, a keeper, and means for moving the bolt into the keeper, comprising a plate and a rotary member for movingrthe same, said rotary member being arranged to cooperate with said plate by moving to a dead center position when the bolt is in final locking position to normally oppose the initial movement of withdrawal of the bolt from looking position by external force applied to the bolt.

2. A lock having a bolt having a rotary locking projection, and means for moving the same comprising a plate, an auxiliary sliding plate for rotating the bolt projection, and a rotary member for moving the same, arranged to cooperate therewith in the locked position to normally hinder the unlocking movement of the bolt by external force applied to the bolt.

3. A lock having a bolt having a rotary locking projection and means for moving the same comprising a plate, an auxiliary sliding plate for rotating the bolt projection, and a rotary member for moving the same arranged to cooperate therewith by moving to a dead center position in the locked position to normally hinder the unlocking movement gf the bolt by external force applied to the olt.

4. A lock having a bolt having a rotary locking projection, and means for moving the same comprising a plate, an auxiliary sliding plate for rotating the bolt projection, a vertically movable plate for cooperating with the auxiliary sliding plate, and a rotary member for moving the same, arranged to cooperate therewith in the locked position to normally hinder the unlocking movement of the bolt by external force applied to the bolt.

5. A look having a bolt h.ving a rotary locking projection and means for moving the same comprising aplate, an auxiliary sliding plate for rotating the bolt projection, a vertically movable plate for cooperating with the auxiliary sliding plate, and a rotary member for moving the same arranged to cooperate therewith by moving to a dead center posi tion in the locked position to normally hinder the unlocking movement of the bolt by external force applied to the bolt.

6. A lock having a bolt having a rotary locking projection, and means for moving the same comprising a plate, an auxiliary sliding plate for rotating the bolt projection, a vertically movable plate having a detent extension for cooperating with the auxiliary sliding plate, and a rotary member for moving the same, arranged to cooperate therewith in the locked position to normally hinder the unlocking movement of the bolt by external force applied to the bolt.

7. A lock having a bolt having a rotary locking projection and means for moving the same comprising a plate, an auxiliary sliding plate for rotating the bolt projection, a ver tically movable plate having a detent extension for cooperating with the auxiliary sliding plate, and a rotary member formovingthesame arranged to cooperate therewith by moving .to a dead center position in the locked position .to normally hinder the un locking movement of the bolt: by external force applied to the bolt.

8. A look having a lockenclosing means, a bolt, .a keeper for the bolt, a projection fixed- 1y secured to the bolt designed to be thrown out 10f alignment with the keeper in looking position and means for moving the bolt into said keeper and throwing the projection out of alignment therewith comprising a main sliding plate, an auxiliary sliding member for throwing the bolt projectionout of alignment, said auxiliary-member having an extension to cooperate with the enclosing means for holdings-aidmember in place during the operation of the lock;

i 9. A look having a lock enclosing-means, a bolt, a keeper for the bolt, a projection fixedly secured to the bolt designed to be thrown out of-a-li gn ment with the keeper in locking position and means for moving the bolt into said keeper vand throwing the projection out of alignment therewith comprising a main sliding plate, an auxiliary sliding member for throwing the bolt projection out of alignment, said auxiliary member having an extension to cooperate with the enclosing means for holding said member in place during the operation of the look, a vertically sliding member and a rotary member for moving the vertically sliding member to thereby move the auxiliary member.

10. A look having a lock enclosing means, a bolt, a keeper for the bolt, a-projection on the bolt designed to be thrown out of alignment with the keeper in looking position'and means ztor moving the bolt into said keeper andlthrowingthe projection out of alignment therewith'comprisinga main sliding plate,an auxiliary sliding member for throwing the bolt projectionout of alignment, said auxiliary member having an extension-to cooperate withthe enclosing means for holding said member in place during the operation of the lock,a spring pressed vertically sliding member and axrotary member for moving the vertically sliding member to thereby move the auxiliary member.

1 1. A lock having a lock enclosing means, abolt, akeeper for the bolt, a projection on the bolt designed to be thrown out of alignment with the keeper in looking position and ,means for moving the bolt intosaid keeper and throwing the projection out ofalignment therewith comprising a main sliding plate, an auxiliary sliding detent member for throwing the bolt projection out of alignment, said auxiliary member having an exttensionlto-cooperate withlthe enclosing means forholdingsaid member-in place during the plate, an auxiliary sliding detent member for throwing the bolt projection out of alignment, said auxiliary member having an ,ex-

tension to cooperatewith the enclosing means for holding said member inp'lace vduring the operation of the look, a spring pressed vertically sliding member and a rotary member for moving the vertically sliding memberito thereby move the auxiliary member.

13. In lock construction, in combinatioma bolt having a transverse projection adj acent the end thereof, a keeper having an opening for receiving the end portion of said bolt, a sliding member to which said bolt is operati-vely related for sliding movementtherewith and for swinging movement relative thereto, said sliding member being slidablein a direction length-wise of the axis of swinging movement of said bolt, means adapted to cause said bolt to'move with said slidingmem her during a portion of the movement of said member thereby to move said bolt into said keeper and adapted-to cause said bolt -to swing relative to said member during asubsequent movement of said member thereby to move said transverse projection out of l-inewith said keeper opening and place said bolt in final locking position, and a crank for moving said slidingmember arranged to move to dead center position atthe completion of said subsequent movement of said member.

14. 'In lock construction, in combination, abolt having atransverse projection adjacent the end thereof, a keeper having an opening for receiving the end portion of saidlboltfa sliding member to whichsaid bolt'is operatively'related for sliding movementtherewith and for swinging movement relativethereto, said sliding member being slidable in a direction lengtliwi'se'of the axis of swinging move,- mentof said bolt, means ,adapted to cause said bolt to move with said sliding member during a portion of the movement of said member therebytomovesaidbolt into saidkeeper and adapted to cause said boltto swing relative to said member during a subsequent movement of said memberthereby to move said transverse projection out of 'line withr said keeper opening and place said bolt in final locking position, a crank arm, and a crank pin on said arm projecting through a slot in said slidingmember and connecting said sliding member to be-moved by turning of said crank, said crank turning to a dead-center dlO position when said sliding member is moved to swing said bolt to final locking position, thereby to oppose swinging movement of said bolt out of said final locking position.

15. In lock construction, in combination, a bolt having a transverse projection adjacent the end thereof, a keeper having an opening for receiving the end portion of said bolt, a sliding member to which said bolt is operatively related for sliding movement therewith and for swinging movement relative thereto, said sliding member being slidable in a direction lengthwise of the axis of swinging movement of said bolt, means adapted to cause said bolt to move with said sliding member during a portion of the movement of said member thereby to move said bolt into said keeper and adapted to cause said bolt to swing relative to said member during a subsequent movement of said member thereby to move said transverse projection out of line with said keeper opening and place said bolt in final locking position, a crank arm, a crank pin on said arm projecting through a slot in said sliding member and connecting said sliding member to be moved by turning ofsaid crank, said crank turning to a dead center position when said sliding member is moved to swing said bolt to final locking position, thereby to oppose swinging movement of said bolt out of said final locking position, and spring means tending to turn said crank into said dead center position.

16. In lock construction, in combination; a bolt having a transverse projection adjacent the end thereof, a keeper having an opening for receiving the end portion of said bolt, a sliding member to which said bolt is operatively related for sliding movement therewith and for swinging movement relative thereto, said sliding member being slidable in a direction lengthwise of the axis of swinging movement of said bolt, means adapted to cause said bolt to move with said sliding member during a portion of the movement of said member thereby to move said bolt into said keeper and adapted to cause said bolt to swing relative to said member during a subsequent movement of said member thereby to move said transverse projection out of line with said keeper opening and place said bolt in final locking position, a crank arm, a crank pin on said arm projecting through a slot in said sliding member and connecting said sliding member to be moved by turning of said crank, said crank turning through substantially 180 degrees in moving said sliding member to move said bolt between final looking position and fully retracted position, said crank stopping substantially on dead center at each end of said turning movement whereby it opposes swinging movement of said bolt out of final locking posit-ion and opposes movement of said bolt out of fully retracted position.

17 In lock construction, in combination, a slidable and rotatable bolt, a sliding plate slidable in a direction lengthwise of the axis of rotation of said bolt, means for causing said bolt to move with said sliding plate throughout a portion of the movement of said plate, thereby to extend and retract said bolt, and adapted to cause said bolt to rotate relative to said plate throughout another portion of the movement of said plate occurring when said bolt is substantially fully extended and a crank for moving said sliding plate, said crank moving into dead center position with respect to the direction of movement of said plate when said bolt is extended and rotated, said crank thereby opposing a reverse rotation of said bolt.

18. In lock construction, in combination, a slidable and rotatable bolt, a sliding plate slidable in a direction lengthwise of the axis of rotation of said bolt, means for causing said bolt to move with said sliding plate throughout a portion of the movement of said plate, thereby to extend and retract said bolt, and adapted to cause said bolt to rotate relative to said plate throughout another portion of the movement of said plate occurring when said bolt is substantally fully extended, a crank arm, a crank pin on said crank arm extending through a slot in said plate, a member connected to said crank pin and slidable in a direction transversely of said sliding plate, and spring means acting upon said member tending to turn said crank, said crank moving into dead center position with respect to the direction of movement of said sliding plate when said bolt is extended and rotated, said crank thereby opposing a reverse rotation of said bolt.

19. In lock construction, in combination, a casing, a slidable and rotatable bolt therein, a plate in said casing movable in a direction lengthwise of the axis of rotation of said bolt, means for causing said plate member and said bolt to move together throughout a portion of the movement of said plate and adapted throughout a subsequent portion of the movement of said plate member to cause said bolt to rotate, a crank arm having a crank pin, a member slidable in a direction transversely of said sliding plate and movable therewith, said member having connection with said crank pin and having a range of movement transversely of said sliding plate sufiicient to permit said crank arm to move into dead center position with respect to the direction of movement of said sliding plate when said bolt is extended and rotated, said crank thereby opposing a reverse rotation of said bolt.

20. In lock construction, in combination, a casing, a slidable and rotatable bolt therein, a plate in said casing movable in a direction lengthwise of the axis of rotation of said bolt, means for causing said plate member and said bolt to move together throughout a portion of the movement of said plate and adapted throughout a subsequent portion of the movement of said plate member to cause said bolt to rotate, a crank arm having a crank pin, a member slidable in a direction transversely of said sliding plate and movable therewith, said member having connection with said crank pin and having a range of movement transversely of said sliding plate sufficient to permit said crank arm to move into dead center position with respect to the direction of movement of said sliding plate when said bolt is extended and rotated, said crank thereby opposing a reverse rotation of said bolt, and spring means acting upon said transversely sliding member in a direction to cause the latter to move the crank toward dead center position.

21. In lock construction, in combination, a casing, a slidable and rotatable bolt, a sliding plate having a spiral slot and pin connection with said bolt, a projecting part on said bolt adapted to coact with a part of said 7 casing, said part being shaped to permit rotation of said bolt only after the latter has been extended out of said casing a predetermined eXtent and thereafter to permit rela tive movement between said plate and bolt to permit said spiral slot and pin connection to rotate the bolt, a crank pivotally supported by said casing, and a member carried by said sliding plate and guided thereon for movement in a direction transversely of the movement of said sliding plate, said member bein connected to said crank and having a range of movement sufficient to permit said crank to move into dead center position with respect to the direction of movement of said sliding plate.

In testimony that I claim the foregoing,

I have hereunto set my hand this 29th day of May, 1925.

' JOSEPH F. FETYK.

DISOLAI MER 1,8O6,991.-J0seph F. Fetylr, New York, N. Y. LOCKING MECHANISM. Patent dated May 26, 1931. Disclaimer filed May 10, 1932, by the patentee, assignee, Francis Keil ct Son, Inc, assenting and concurring. Hereby enters the following disclaimer Whereas claim 1, after setting forth a bolt and a keeper, specifies means for moving the bolt into the keeper, comprising a plate and a rotary member for moving the same, said rotary member being arranged to cooperate with said plate by moving to a dead center position when the bolt is in final locking position to normally oppose the initial movement-of withdrawal of the bolt from looking position by external force applied to the bolt, and whereas the bolt is not only moved but also rotated into the keeper about an axis parallel to its direction of movement in order to bring the bolt into its final locking position, and whereas the above-quoted expressions are possibly susceptible of too broad an interpretation and, when so interpreted, are liable to cover or include elements and/or arrangements not intended to be covered by these terms, such as an arrangement like that disclosed and described in United States Letters Patent No. 830,118 to H. G. Voight, issued September 4, 1906 (which,

incidentally, does not suggest or disclose my invention), wherein a non-rotating or dead-bolt H is thrown into locked position by a member K connected to an eccentric or crank extension on a rotary hub I which are made to assume a position wherein the eccentric or crank extension of the hub assumes virtually a dead center position, the liability to such possible interpretation not being intended or foreseen and thus being accidental, I hereby disclaim any such broad meaning or interpretation of the above-quoted terms of claim 1 as will cover or include thereby such a non-rotary or dead-bolt arrangement as is disclosed in the above-mentioned United States Letters Patent No. 830,118 and, to clarify the nature of this disclaimer, I disclaim, insofar as claim 1 is concerned, any lock construction in which either the bolt is not rotated about an axis parallel to the line of movement of the bolt or the movement of the bolt into final locking position is not achieved by movement of both translation and rotation of the bolt.

[Ofiicial Gazette May 31, 1.932.] 

